Addresses
1,024
1.0K
Sub-ranges
3+
within this block
PTR Density
0.0%
0 of 1.0K IPs have PTR
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
77/100
Moderate
How this score is built
- Baseline (neutral) 65
- Academic allocation +6
- Long-established allocation (35y) +6
- Trust score 77 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Ranges inside 157.21.192.0/22
| CIDR | IPs | Organization | ASN | Country |
|---|---|---|---|---|
| 157.21.194.0/23 | 512 | Old Dominion University | AS1201 | US |
| 157.21.192.0/24 | 256 | Eastern Virginia Medical School | AS53446 | US |
| 157.21.193.0/24 | 256 | Old Dominion University | AS1201 | US |
Geolocation
First 256 of 1,024 IP addresses in 157.21.192.0/22
157.21.192.0
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+ 768 more (range too large to list inline)
BGP Routing
Live BGP anomalies →Not announced as an exact prefix — covered by the announced supernet 157.21.192.0/18.
Announced prefix
Origin AS
Announcement samples
334
Last seen
2026-09-11 23:39:37
Frequently Asked Questions
What is 157.21.192.0/22?
157.21.192.0/22 is a CIDR network block containing 1,024 IPv4 addresses (from 157.21.192.0 to 157.21.195.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.
Who owns the 157.21.192.0/22 network?
The 157.21.192.0/22 range is allocated to Old Dominion University and announced via AS1201 from United States.
Last updated: 2026-09-12 08:55:41 UTC
